Hot Water Heater Switch or Meter??
Are you subscribing to a plan with your power company whereby you get a lower price per kilowatt hour in exchange for the company being able to kill the power to the heater at certain hours of the day?
That gadget looks like something that would control the water heater circuit for such a purpose, using some remote control mechanism, either using an audio signal superimposed on the power line, or some radio control. Are there any other wires coming out of that cylindrical box?
The upper object in the box is a relay, that would activate or kill the water heater circuit. The lower object is a transformer, similar to a doorbell transformer, that provides a low voltage to operate the relay. The little objects on the sides look like fuses. There must be some other, electronic, circuitry although the latter could be somewhere else or might even be too small to identify in the picture.
Last edited by AllanJ; 12-28-2007 at 03:39 PM.